CZ does make 75s in .40. and I suspect that's what you saw. Same gun, but without the ambidextrous controls. (That's the main difference between the 75B and 85B.)

I'd snap up an 85(B) or 85 COMBAT, in .40, if I found one. That's a very rare gun!!

If you really want a .40, the 75B in .40 is a fine gun, and worth consideration. Few guns feel better in the hand. Even better, the Kadet Kit (an exceptionally accurate .22 top end) works on the 75 and 85 series guns.